What is anti-Semitism? Why was Adolf Hitler prejudiced against Jews?

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"Hostility to or prejudice against Jewish people." Is the definition.

The reason he saw the Jews as the problem was he said they were the reason Germany lost. There is a myth thats called ‘stab-in-the-back legend’ that became popular. According to this myth, Germany did not lose the war on the battlefield, but through betrayal at the home front. The Jews, Social Democrats, and Communists were held responsible.

Hitler blamed the Jews for everything that was wrong with the world. Germany was weak and in decline due to the 'Jewish influence'. According to Hitler, the Jews were after world dominance. And they would not hesitate to use all possible means, including capitalism. In this way, Hitler took advantage of the existing prejudice that linked the Jews to monetary power and financial gain.  

abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.